TABLE 2.   Estimated C mass balances for open-system incubations for three fungal species on C3- and C4-derived sucrose Sugar Species No. of replicates C mass balance (g) % of original C used Blank medium Fungusa Respired CO2b C3-derived sucrose C. volvatus 16 0.440 ± 0.017 0.020 ± 0.006 0.015 ± 0.005 7.97 ± 2.42 M. androsaceus 18 0.440 ± 0.017 0.065 ± 0.013 0.047 ± 0.009 25.38 ± 4.89 S. granulatus 15 0.440 ± 0.017 0.015 ± 0.009 0.011 ± 0.007 5.83 ± 3.82 C4-derived sucrose C. volvatus 3 0.438 ± 0.015 0.030 ± 0.010 0.022 ± 0.006 11.66 ± 3.70 M. androsaceus 8 0.438 ± 0.015 0.061 ± 0.016 0.044 ± 0.012 23.66 ± 6.47 S. granulatus 8 0.438 ± 0.015 0.017 ± 0.009 0.012 ± 0.007 6.44 ± 3.87 a The original fungal inoculum contained less than 0.5 × 106 g of C. b The amount of respired CO2 was estimated by using the average ratio of CO2 to fungal biomass obtained in closed systems (0.722) (Table 1).

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